JPH0624477A - Security enclosure, its forming method and laminate to be used for said forming - Google Patents

Abstract

PURPOSE: To provide a security enclosure to ensure to detect interference to contents by preparing a laminate on a flat sheet, the laminate including a folded, flexible, electrically insulating sheet extending over the whole of the area of the enclosure, and by assembling the sheet. CONSTITUTION: The security enclosure 20, which is formed to a wedge-shaped box with a head, are assembled from a foldable to desired shape, flexible, flat sheet including a laminate 34. The laminate 34 has various layers constructed to detect any attempt to break the enclosure 20 and electrical characteristics of each layer may be monitored via electrical circuits. That is to say, the laminate 34 has an electrically responsive matrix and the matrix is divided to a core portion 36 and an expanded portion 38 placed at the edge of the core 36. And the laminate 34 has a flexible, electrically insulating sheet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to security enclosures, and more particularly to security enclosures that provide warnings or destroy or erase information in the event of interference with the enclosure for the purpose of approaching objects within the enclosure. Regarding The present invention also relates to sheets and laminates used to make such enclosures, and methods of making such enclosures. The invention has particular application to security enclosures having walls formed of flexible laminate folded to form the enclosure.

[0002]

BACKGROUND OF THE INVENTION A security enclosure is provided with a wall or sheet containing coils, meshes or grids of electrically responsive material, the sheet containing the material being pierced or otherwise attempting to open the enclosure. To provide an indication when an attempt is made,
It is known to monitor certain electrical properties of the material. If an object in the enclosure contains, for example, sensitive magnetically recorded information, detection of such an attempt can activate an alarm, destroy the material or object in the enclosure, or erase the information. An example of such an enclosure is the Wolf's PCT International Application Publication No. WO
87/06749, GAO Gesellschaft Fur Automation und Or
It is disclosed in British Patent No. 1,375,926 of ganisation mbH, US Patent No. 4,785,743 of Dalphin and European Patent Publication No. 277,679 of Seculock BV. However, the present invention is not limited to WL Gore and Associates' UK Patent Publication GB22.
It is more closely related to the security enclosure disclosed in 20513A. The security enclosure disclosed therein is formed from a layer of flexible material comprising a matrix of diagonally extending semi-conductive lines printed on a rectangular thin insulating film. The matrix of lines forms a continuous conductor that breaks when an attempt is made to break the film. The circuit is monitored by opening the conductor at one point and measuring the change in resistance of the conductor between the two ends of the circuit.

The enclosure disclosed by the Gore application is
Folding a rectangular laminate in the form of a shallow rectangular envelope, which simply comprises various layers of flexible material and a matrix of diagonally extending semi-conductive wires, and then the edges of the laminate forming the envelope. It is formed by fixing each other as much as possible.

[0004]

Although the disclosed laminate is flexible, it is necessary for the formation of the enclosure because the semiconductive wires forming the matrix can be damaged by folding. It would be preferable to minimize the number of folds. Thus, the enclosure thus formed is not well suited for containing items that are relatively thin and not flat.

[0005]

SUMMARY OF THE INVENTION According to one aspect of the present invention, a laminate used to form a security enclosure, the laminate comprising a wire made of a conductive material on each side. A flexible electrically insulating sheet for retaining, the lines forming conductors extending across both sides of the sheet, the lines being on one side of the sheet and the individual lines on the other side of the sheet. An electrical connection between is provided by a line connection extending through the sheet, the line connection being spaced inwardly from the edge of the laminate at at least one edge of the laminate and separated from the edge by a line retaining portion of the sheet. And attempting to break the laminate results in damage to the wire and changes the detectable electrical properties of the conductor; and measuring such changes. Means for connecting the conductor to that unit;
A laminate comprising:

[0006] Preferably, the laminate further comprises a wire retention core portion and a wire retention extension at the edge of the core portion, the core portion on one side of the sheet through a wire connection to the core. It has a line connected to a line on the other side of the section and a line connected to a line on the extension. More preferably, the extension also has a line connection between a line on one side of the extension and a line on the other side of the extension.

In use, the laminate is folded into an enclosure and at least some of the folds in the laminate are formed between the edges of the core portion and the extension. Once multiple conductors have been provided and once the laminate has been formed into an enclosure, the electrical properties of each conductor are individually monitored through the conductor connecting means and induced by an attempt to break the sheet. The change in electrical properties preferably triggers an alarm or destroys or erases the information contained within the enclosure, for example.

Further preferably, the line connections are in the form of apertures extending between overlapping lines with conductive material, the conductive material extending through the apertures for connecting the wires. ing. In a preferred embodiment, the lines are formed by printing a semi-conductive ink on the sheet, and when the ink is printed on the aperture, the ink has a conductive lining on the aperture wall. To form.

The edges of the core portion are preferably aligned to facilitate folding into a sheet between the core portion and the expansion portion. Depending on the shape of the enclosure formed from the laminate, extensions may be provided at multiple edges of the core portion. Most preferably, at least the core portion is rectangular.

A line on the outer edge of the extension facilitates detection of attempts to gain access to the enclosure formed of the laminate by separating the extension from the complementary overlap. You may make it relatively brittle.

Further preferably, the line on one side of the sheet extends obliquely with respect to the line on the other side to divide the sheet into a number of relatively small areas. The lines of electrically responsive material are preferably of semi-conductive material and may be straight or corrugated.

In accordance with a further aspect of the invention, a security enclosure is foldable that extends over the area of the enclosure and retains on each side a wire made of an electrically responsive material. A flexible electrically insulating sheet, the lines forming conductors extending across both sides of the sheet, between the lines on one side of the sheet and the individual lines on the other side of the sheet. An electrical connection is provided by a line connection extending through the sheet, at the desired edge of the sheet the line connection is spaced inside the edge and separated from the edge by individual line retaining portions of the sheet. A means for detecting a change in the electrical properties of the conductor induced by an attempt to break the sheet; and a means for detecting the conductor. Means for connection; security enclosure comprising a are provided.

Preferably, the sheet includes a line retention core portion and line retention extensions at individual edges of the core portion, the core portion on one side of the sheet through line connections to the core. It has a line connected to a line on the other side of the section and a line connected to a line on the extension. Most preferably, each extension also has a line connection between a line on one side of the extension and a line on the other side of the extension. At least some of the folds in the sheet may be formed between the edges of the core portion and adjacent extensions.

Preferably further, a plurality of conductors are formed by the lines, the conductor connecting means being provided at an edge portion of the sheet for individually connecting the conductors to the connecting means. The connecting means may include switch means which may be selectively configured to connect a connection associated with the connecting means with a desired conductor. The ability to couple individually monitored conductors with various sensing means connections increases the difficulty a potential intruder encounters in an attempt to enter the enclosure.

Further preferably, one edge portion of the sheet connects each of the lines on one side of the sheet with a desired one of a plurality of lines on the other side of the sheet. A plurality of line switch means selectively configured to be included. Providing a sheet with a change in conductor configuration in a similar enclosure by providing the line switch means,
This is possible simply by changing the configuration of the line switch means.

According to yet a further aspect of the invention, a method of forming a security enclosure, the method comprising a flexible electrically insulating sheet carrying on each side a wire made of an electrically responsive material. The wire forms a conductor extending over both sides of the sheet, and an electrical connection between a line on one side of the sheet and an individual line on the other side of the sheet extends through the sheet. Provided by wire connection to
The sheet includes a line retention core portion and a line retention extension portion,
Each extension forms an edge of the sheet, and at the desired edge of the core portion the line connections are spaced within each adjacent edge of the sheet and separated from the adjacent edge by an individual extension. Providing means for detecting changes in the electrical properties of the conductor induced by an attempt to break the sheet; and means for connecting the conductor to the detecting means. Providing; folding the sheet between the core portion and the extension so as to form an enclosure and overlap the individual edge portions of the sheet; and securing the overlapping edge portions of the sheet. A method comprising:

These and other aspects of the invention will now be described by way of example with reference to the accompanying drawings.

[0018]

EXAMPLE First, FIG. 1 will be described. FIG. 1 shows a security enclosure 20 in the shape of a wedge-shaped box with the tip cut off and having upper and lower walls 22, 24, side walls 26, 28, and end walls 30, 32. Enclosure 20 is formed as a flat sheet and includes a flexible laminate that can be folded into a desired shape. FIG. 2 is a schematic diagram of a laminate 34 used to form the enclosure 20. Enclosure walls 22, 24, 26, 2
The parts of the laminate 34 forming 8, 30, 32 are connected by the same reference numbers to the corresponding walls shown in brackets.

Laminate 34 includes various layers adapted to detect any attempt to break enclosure 20. The various electrical properties of the laminate 34 are monitored by suitable electrical circuitry, and any attempt to break the laminate causes a change in the electrical properties, which is detected and used to generate an alarm. Alternatively, the information stored in the enclosure 20 is erased or destroyed.

One of the laminates 34 to which the present invention is particularly relevant.
On the side, a matrix 45 of electrical reaction lines is provided. These are shown in more detail in FIGS.
The matrix is divided into many parts, such as a central rectangular parallelepiped core portion 36 defined by line 36a in FIG. 2 and an extension portion 38 located at the edge of the core portion 36. The edges of core portion 36 and extension portion 38 are shown in FIG. This laminate 34 comprises a flexible electrically insulating sheet 40 having lines 42, 44 of electrically reactive material on each side.
including. In the preferred arrangement, other layers of various materials are provided, and these are described below with reference to the subsequent drawings. In FIG. 3, lines 42 on both sides of sheet 40,
44 is shown as a solid line and line 42 extends from the lower right corner of the figure to the upper left corner of the figure on the upper surface of seat 40, while the line 42 extends from the lower left corner of the figure to the lower surface of seat 40. Extend to the upper right corner. As described, the lines 42, 44 extend diagonally across the sheet 40 to divide the sheet into a matrix of diamond-shaped regions, with the lines on one side relative to the lines on the other side. Extend diagonally.

The connection between lines 42 and 44 is provided at pad 26, the majority of which is provided at the edge of core portion 36, but many also occur at extension 38. Pads are provided on each side of the seat, and two pairs of pads 46
a and 46b are shown in FIGS. The connection between the lines is
The semiconductor ink is used so that the lines on one side come into contact with the lines on the other side when the lines 42, 44 are preferably formed by printing by forming holes through the sheet and the lines 42, 44 are preferably formed by printing. And is formed so as to extend through the hole 48. In practice, the lines are printed on one side of sheet 40 before the holes are formed. The holes are then punched into the sheet, and the connecting hole inner layer 50 is formed when a second set of lines is printed on the other side of the sheet.

It can be seen that the pad 46b lacks a through hole so that there is no interconnection between the lines at the pad 46b.

The matrix of wires 42,44 forms many loops or conductors which are destroyed when an attempt is made to break the laminate by cutting, polishing, solvent application or heating.

FIG. 6 illustrates a portion of the laminate in a somewhat enlarged detail view, which will be described, although in this particular example, holes are provided in most of the pads 46 at the edge of the core portion 36. , There are no holes in some of the pads 46 (every fourth pad), and the line continues into the extension 38. On the core portion 36, the individual lines are straight and extend directly between the pads on the different edges of the core portion 36, while on the extension portion 38 the lines have a bend and extend in various directions, As can be seen more clearly in FIG. 7, the top surface line of the core portion therein is labeled as 42a, the top surface line of the extension portion is labeled as 42b, the bottom line of the extension portion is labeled as 44b, and Core portion 36
The line on the underside of is displayed as 44a. The connection between lines 42b and 44b of extension 38 is provided through perforated pad 46c, which is spaced outwardly from the inner edge of extension 38.

When forming the enclosure 20, the laminate 34 is folded along phantom lines 52, a number of phantom lines extending between adjacent core and extension portions (FIG. 2) and sidewalls 26, 28. Overlapping extensions 38 that form the end wall 32 are overlapped, as described below.
It is fixed to the other one using an adhesive.

The fold lines 52 in the region between the core portion 36 and the expanded portion 38 are relatively few in the majority of the fold lines 52, reducing the flex lines 42 and 44 to prevent damage. Reduce the likelihood. Moreover, the flexibility of the laminate is reduced at the perforated pad locations 46a, 46c so that the fold lines are spaced from the pad locations and no folds occur on the pads.

It is a further advantage of the laminate construction that the perforated pads are spaced from the edges of the laminate 34. Enclosure 20 is exposed to a very high degree of attack and perforated pads 46a, 46.
c is a relatively fragile portion of the structure.
Since the edge of the laminate is one of the better points to try to gain access to the enclosure 20,
Attempts to gain edge intrusion result in lines 42b, 44b
The pads are thus spaced from the edges in such a manner that they tend to cause damage to the edges, and the lines 42b, 44b provided at the edges outside the extension 38 are formed of a more brittle material, or Formed narrow at the edges. Moreover, the provision of separate extensions 38 allows the use of extensions that provide a hyperfine isolation pattern at the sealing edge of the enclosure.

The use of the core portion 36 and the individual extension portions 38 allows greater flexibility for the enclosure designer in producing different shaped laminates and enclosures. By using the "standard" core portion 36, the size and position of the extension can be changed relatively easily. This is the line 42,4 extending between the parts 36,38.
This is accomplished by simply changing the length of 4 and then allowing the width of the region between the portions 36, 38 to be changed. The spacing between the edge of the sheet and the line on the extension is also varied.

The provision of the extension portion 38 also allows illegal protection, especially in non-orthogonal regions, without changing the configuration of the core portion 36 or the electrical connection to the matrix 45, as will be explained later. And The extension portion 38 leaves the areas of lines 42, 44 free so that these areas are separated to facilitate folding to form the enclosure and as well to facilitate the construction of the corners of the enclosure. Used for. Referring to FIG. 2, the fold line 52 divides the corners of the laminate 34 into triangular portions 76, and one of each triangular portion 76 has no lines 42,44 disposed therein.

The corners of the laminate 34 are shown in greater detail in FIGS. 8 (a) and 8 (b). When the laminate is folded to form the enclosure, its corners are shown in Figure 8 (b) to ensure that there is one layer of laminate 34 with the lines 42, 44 intersecting the corners of the enclosure. So that it is folded inside (or outside).

Other features of laminate 34 and enclosure 20 will now be described. As mentioned above, the individual lines 42,
44 are connected to form many continuous conductors, and in this example the laminate is provided with four conductors each of the same electrical length. Conductor monitoring is accomplished by monitoring the voltage or potential drop across each conductor. In order to break the sheet without affecting the lines 42, 44 and the voltage drop between the conductors, the lines that determine each loop are first identified and sufficient to obtain effective penetration into the enclosure. It is necessary to draw out the intersecting sections of the line to generate the size hole. In the preferred embodiment, additional means are provided to detect breakthroughs in the laminate, as will be described with reference to FIG. 9 and a brief description of the preferred laminate construction will follow.

Typically, pad 46 has a maximum area of 1
Spaced to generate a matrix of diamond-shaped regions no greater than 0 mm. The sheets and lines are further overprinted with a layer of non-conductive ink (not shown) of the same color as the semiconductor ink used to form the lines 42, 44 so as to hide the matrix. It is preferred that carbon be used to provide the semiconducting properties of the matrix, as it is the easiest way to escape advanced investigation techniques such as X-ray inspection. The preferred material is 0.0
A polyester film of a thin insulating sheet 40 with a thickness of 25 mm or less, and a carbon-filled polyester adhesive for screen-printed lines 42, 44 and pads 46. Typically, the lines 42,44 are less than 1 mm wide and the pad 46 is less than 1.5 mm in diameter. Carbon is selected to produce low resistance with a small amount of fill.
Typically, 25% carbon is added to the polyester to form a 6 Ω-cm resistance.

The overprint layer (not shown) is also a carbon-added polyester film. In this case, carbon is added in small amounts and with minimal change in electrical resistance,
Selected to produce a dark color (black). A resistance of typically 10 ¹³ Ω-cm or more is achieved with 2% addition, giving good blackness.

The laminate for forming the walls of the preferred security enclosure includes a number of additional layers, as will now be described with reference to FIG. 9 and subsequently with reference to FIG. The flexible sheet 40 holds the lines 42 and 44,
The overprinted layer is then represented by a layer 54 sandwiched between two thin insulating films 56, 58 of polyester, for example. The top of this sheet further has two thin insulating films 60,62 and two layers 64,66 of semiconductor fiber material.

In use, when a sharp object penetrates the layer, the object is pulled through the intervening insulating layer 60 so that the debris of the outer semiconductor layer 66 contacts the inner semiconductor layer 64 and makes electrical contact therewith. In addition, each semiconductor layer 64, 66 is entirely made of fibrous material. Because of the high probability that conductive paths will be formed, the insulating layer 60 is made thinner than the average length of conductive fibers that are created by piercing an object through the semiconductor layer. Preferably, the insulating layer 60 is not thicker than the semiconductor layer and is preferably made thinner. Typically, the semiconductor layers 64 and 66 have a thickness of 0.05 mm, and
The thickness of 6,58,60,62 is 0.025 mm or less. Suitable semiconductor fiber materials are typically 1-10 Ω-
A non-sintered carbon-loaded polytetrafluoroethylene (PTFE) with a resistance value of cm, the preferred insulating material is polyester film.

FIG. 10 shows two overlapping extensions joined together to form the walls of the enclosure.
The reference numbers used for the upper overlap (as seen in FIG. 10) are typically labeled with the letter "a", while the lower section is typically labeled with the letter "b". The figure additionally shows an object 78 within the enclosure 20. The thickness of the various layers are exaggerated for clarity,
Adhesive layers 80, 82, 84 between lines 42b, 44b are then shown, and the semiconductor fiber layer is shown as "compressed" for clarity as layer 86. Moreover, an additional layer of material 8
It will be appreciated that 8 is inserted between seat 40 and line 44b located outside seat 40 of enclosure 20. Layer 88 has a lower bond (c) than adhesion.
It is formed by a low tension material with ohesion. This layer is, for example, 70% VA, a fugitive silica (typically having a particle size of 12 mm and a surface area of 20 m ² / g) of 45% -60% (by weight), high. Includes ethyl vinyl acetate (EVA) having a vinyl acetate (VA) content. It is also preferred that the material comprises a black pigment such that the carbon-doped semiconductor wires 42, 44 are not readily visible on layer 88.

The adhesive layers 80, 82, 84 are preferably formed of a pressure sensitive, heat reflowable adhesive of, for example, high VA content EVA colored in black with 70% VA. The overlying extension 38a has an insulating film 58a extending beyond the edge of the sheet 40a forming the flap A. The underside of flap A is provided with an adhesive layer 80A, which is used to secure flap A to overlapping extension 38b.

The layer 86a does not extend to the edge of the sheet 40a, but on the "exposed" inner surface of the sheet 40a, an edge layer 92a of low tension material is provided below the conductive line 42b. Adhesive additional layer 93a is applied over exposed line 42b and continues until it exceeds the inner edge of layer 86a.

On the other overlapping extension 38b, the upper insulating film 58b does not extend to the edge of the laminate 34, leaving a portion of the adhesive layer 82b exposed. Further, the adhesive layer 93b is applied to the edge of the film 58b.

The overlapping portions 38a, 38b are held together and the different adhesive layers 80a, 93a, 93b, 82b with which they come into contact are homogeneous until the end of the period of providing a secure bond. If an attempt is made to separate the edges, the outer film 58a is folded back and one or more low tension layers 88a, 92a, 88b are attached to line 4.
Break 2,44 and fall apart.

FIG. 11 shows a preferred circuit that provides a means for detecting changes in the electrical properties of laminate 34. Semiconductor layers 64, 66 are shown and blocks LA, LB, L
C, LD represent the four conductors formed by the lines 42, 44 printed on the sheet 40. The conductors are connected in series between reference potentials and a connection is made between each conductor and a comparison circuit 68 arranged to detect any changes in the monitor potential. Penetration of semiconductor layers 64 and 66 or conductor L
Any damage to A, LB, LC, LD will result in a change in monitor potential, producing an output from comparator circuit 68, alarming through a suitable amplifier, or initiating any other suitable operation.

The connection between the conductor and the comparison circuit 68 is made directly from one edge of the core portion 36 or the extension portion 38. However, it is preferred that the connection configuration between the comparison circuit 68 and the conductor be easily changed by the manufacturer and the configuration of the conductors on the sheet 40 can be changed to provide a safer enclosure. A configuration that provides these features is described with reference to FIG. It should be noted that this configuration has been described and explained in more detail in a previously filed application, referred to as a security enclosure improvement.

FIG. 12 shows the end wall 3 of the enclosure 20.
2 represents the edges of a laminate that are folded to form 2. It should be noted that each line 42, 44 is provided with five pads at the edge of the core portion 36 and that no extension portion 38 is provided. The provision of five pads allows the selection of pads that are perforated at the manufacturing stage to provide a particular shaped conductor. In addition, the connection between the laminate and the comparison circuit 68 is shown, which is formed in a matrix type connection means of a conductive path 70 connected to a conductor 72 linking with the comparison circuit.

Referring to this example, the conductive passages 70 include a series of longitudinal passages 94 on the upper surface of the sheet 60 and a series of lateral passages 96 on the lower surface of the sheet. Lateral passage 96
Passes under the connection 72, and the electrical connection between the predetermined one of the connections 72 and the lateral conductive passage 96 is made in the same manner as the connection at the pad, that is, the passage 96 and the connection 7.
This is done by forming holes through the sheet at the intersection of the two and printing one of the passages so that the conductive ink extends through the holes that form the connection between the passages. The lateral passages 96 and the longitudinal passages 94 are accomplished in a similar manner. Furthermore, the connections 73, 75 are connected to the conductive paths 94, 9
A matrix 70 of six, connections 72, and electrical connections between the two semiconductor layers 64, 66 of the laminate are provided on either outside of the connections 72.

The vertical conductive passages 94 are formed in the matrix 45.
A long passage 94a extending to contact the pad 98 at the last edge of the sheet and a short termination on the pad provided at the end of every other conductor line 44 on the underside of the sheet 40 directly in the pad. Every other passage 94b is formed.

It should be noted that there are numerous possible connections formed between passageways 94, 96 and matrix 45. This means provides a connection between the matrix 45 and the passages 94, and therefore the matrix 45 and the connection
Allows the manufacturer to change the connection between the two. Therefore, referring to FIG. 11, the conductors LA, LB, LC,
The LD is represented by any one of the many contours of the lines 42, 44 on the sheet, and thus, for intruders from tests on many enclosures equipped with similar sheets, the path of a particular conductor and Predicting that particular reference potential is very difficult.

To allow the use of a similar comparator circuit 68 for each sheet produced, the total length of each conductor, even those formed on the sheet, is the resistance or resistance in each conductor. It is necessary that the changes in potential are the same, and that the conductors are the same length so that they are placed in the desired position with respect to the comparison circuit 68.

[0048]

From the above description, it is understood that the present invention readily forms a solid box-shaped enclosure and provides a laminate that is used to accommodate a variety of objects of different shapes. .

For those skilled in the art, the above-mentioned example is merely one example of the present invention. Enclosure 2 above
0 is wedge-shaped, but the laminate could equally well be shaped to produce a cubic or rectangular enclosure.

[Brief description of drawings]

FIG. 1 is a perspective view of a security enclosure according to a preferred embodiment of the present invention.

2 is a schematic view of a laminate used to form the enclosure of FIG.

FIG. 3 is an enlarged view of a region 3 of FIG.

4 is an enlarged view of a portion of the edge of the core portion of the laminate of FIG.

5 is a cross-sectional view taken along line 4-4 of FIG.

FIG. 6 is an enlarged view of an edge of the laminate shown in FIG.

FIG. 7 shows a particular line made of an electrically responsive material, FIG.
FIG. 6 is a view of a portion of the laminate of FIG.

FIG. 8 is an enlarged view of a corner of the laminate of FIG. 2 and an enlarged view of the corner after folding.

9 is an exploded side and side view of the flexible laminate of FIG.

FIG. 10 is a cross-sectional view showing the edge portions of a laminate bonded together to form the walls of the enclosure.

11 is a diagram of a circuit for use with the security enclosure of FIG.

FIG. 12 is an enlarged view of an edge portion of the laminate of FIG.

[Explanation of Codes] 20 ... Security Enclosure 26 ... Pad 34 ... Laminate 36 ... Core Part 38 ... Expansion Part 40 ... Flexible Electrical Insulation Sheet 42, 44 ... Electrically Reactive Material Line 45 ... Electrically Reactive Line Matrix 46 ... Pad 54 ... Overprinting layer 56, 58, 60, 62 ... Insulating layer 64, 66 ... Semiconductor layer 68 ... Comparison circuit 70 ... Conductive passage 72 ... Conductor 73, 75 ... Connection 76 ... Triangle Part 78 ... Object in enclosure 20 80, 82, 84 ... Adhesive layer 86 ... Semiconductor fiber layer 88 ... Material addition layer 92 ... Low tension material edge layer 93 ... Adhesive addition layer 94 ... Longitudinal conductive passage 96 ... Lateral conductive passage 98 ... Pad A ... Flap LA, LB, LC, LD ... Conductor

Claims (18)

[Claims] 1. A laminate for use in forming a security enclosure, the laminate being a flexible electrically insulating sheet carrying a wire made of a conductive material on each side thereof. Forming conductors extending across both sides of the sheet, electrical connections between lines on one side of the sheet and individual lines on the other side of the sheet are provided by line connections extending through the sheet. , The line connection at at least one edge of the laminate is spaced inwardly from the edge of the laminate and separated from the edge by the line-holding portion of the sheet, and any attempt to break the laminate will damage the line. Resulting in a change in the detectable electrical property of the conductor;
And a means for connecting the conductor to a means for measuring such changes. 2. A line retention core portion and a line retention extension at an edge of the core portion, the core portion on one side of the sheet, through a line connection, on the other side of the core portion. 2. The laminate of claim 1 having a line connected to the line and a line connected to the line on the extension. 3. The laminate of claim 2, wherein the extension also has a line connection between a line on one side of the extension and a line on the other side of the extension. 4. A laminate according to claim 1, wherein a plurality of conductors are provided and the electrical properties of each conductor can be individually monitored through the conductor connecting means. 5. The line connection is in the form of an aperture extending between overlapping lines having conductive material, the conductive material extending through the aperture to connect the lines. The laminate according to claim 1. 6. The line is made of semi-conductive ink, the ink forming a conductive inner layer on the aperture wall,
The laminate according to claim 5. 7. The laminate of claim 2, wherein the edges of the core portion are aligned to facilitate folding into a sheet between the core portion and the extension. 8. The laminate of claim 7, wherein the core portion is provided with extensions on a plurality of edges and at least the core portion is rectangular. 9. The laminate of claim 1 wherein the line on one side of the sheet extends obliquely with respect to the line on the other side to divide the sheet into a number of relatively small areas. . 10. A security enclosure, which is a foldable flexible electrically insulating sheet that extends over the area of the enclosure and retains on each side a wire made of an electrically responsive material. The wire forms a conductor extending over both sides of the sheet, and an electrical connection between a line on one side of the sheet and an individual line on the other side of the sheet extends through the sheet. Provided at the desired edge of the sheet, the line connection being spaced inside the edge and separated from the edge by individual line retaining portions of the sheet; Means for detecting a change in the electrical properties of the conductor induced by an attempt to connect the conductor; and means for connecting the conductor to the sensing means. Security enclosure. 11. The sheet includes a line retention core portion and line retention extensions at individual edges of the core portion, the core portion on one side of the sheet through a line connection of the core portion. A line connected to a line on the other side and a line connected to a line on the extension, at least some of the extensions being stacked to form the enclosure and the sheet Bound to the complementary part of
The enclosure according to claim 10. 12. The enclosure of claim 11, wherein each extension also has a line connection between a line on one side of the extension and a line on the other side of the extension. 13. At least some of the folds in the sheet are formed between edges of the core portion and adjacent extensions, and the number of lines intersecting the folds is relatively small. 11. The enclosure according to item 11. 14. A wire provided on the outer edge of the extension is relatively relatively to facilitate detection of an attempt to gain access to the enclosure by separating the extension from complementary overlap. It is fragile, Claim 11.
Enclosure as described. 15. A plurality of conductors are formed by the wire,
The conductor connecting means is provided at an edge portion of the sheet for individually connecting the conductors to the connecting means.
0 described enclosure. 16. The enclosure of claim 15 wherein said connecting means includes switch means selectively configured to connect a connection associated with said connecting means with a desired conductor. 17. An edge portion of one of the sheets is selective to connect each of the lines on one side of the sheet with a desired one of a plurality of lines on the other side of the sheet. The enclosure of claim 10 including a plurality of wire switch means configured in. 18. A method of forming a security enclosure, the method comprising: a flexible electrically insulating sheet carrying on each side a wire made of an electrically responsive material, the wire comprising both sides of the sheet. An electrical connection between a line on one side of the sheet and an individual line on the other side of the sheet is provided by a line connection extending through the sheet. Includes a line-retaining core portion and a line-retaining extension portion, each extension portion forming an edge of the sheet, and at the desired edge of the core portion, the line connection is spaced apart within each adjacent edge of the sheet. And separated from the adjacent edges by individual extensions; sensing changes in the electrical properties of the conductor induced by an attempt to break the sheet. Providing means; providing means for connecting the conductor to the sensing means; forming an enclosure, the sheet between the core portion and the extension portion such that individual edge portions of the sheet overlap. Folding; and fixing overlapping edge portions of the sheet.